本文選題：北斗衛(wèi)星導(dǎo)航 + 高精度定位��； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：作為可以和美國(guó)GPS相媲美的全球四大衛(wèi)星導(dǎo)航系統(tǒng)之一——北斗導(dǎo)航,是我國(guó)獨(dú)立研究開(kāi)發(fā)的且是目前唯一一個(gè)具有發(fā)送短報(bào)文信息能力的導(dǎo)航系統(tǒng),在海、陸、空等方方面面都有著舉足輕重的作用。采用偽距定位已不能滿(mǎn)足高精度的要求,因此需要用觀測(cè)精度較高的載波相位觀測(cè)值來(lái)進(jìn)行定位。然而,采用載波相位定位方式存在周跳的問(wèn)題,若不進(jìn)行處理,將使定位精度大打折扣。本文針對(duì)北斗載波相位定位中周跳探測(cè)與修復(fù)方法進(jìn)行研究,為北斗高精度定位周跳探測(cè)與修復(fù)提供理論參考。在單頻周跳探測(cè)與修復(fù)方法的基礎(chǔ)之上,結(jié)合三頻線性組合理論,將單頻周跳探測(cè)擴(kuò)展到北斗三頻周跳探測(cè)與修復(fù)中,并且重點(diǎn)研究了小周跳的探測(cè)與修復(fù),將載波相位中傳統(tǒng)的時(shí)域周跳探測(cè)方法延伸到頻率域,用頻域的信號(hào)處理的方法來(lái)有效分析小周跳。主要研究工作如下:(1)對(duì)單頻載波相位觀測(cè)值中發(fā)生的小周跳,用SVD及Hilbert分量包絡(luò)變換的方法進(jìn)行探測(cè),可實(shí)現(xiàn)小周跳的識(shí)別與定位。(2)研究了三頻載波相位組合觀測(cè)量的特性,將三頻偽距相位和電離層殘差法相結(jié)合應(yīng)用到北斗三頻載波相位周跳探測(cè)中,構(gòu)建3個(gè)線性不相關(guān)的三頻組合周跳檢驗(yàn)量,可實(shí)現(xiàn)任意周跳組合的探測(cè),并且此方法可保持組合模糊度的整周特性,將周跳探測(cè)出來(lái)之后,只需對(duì)探測(cè)出的周跳值進(jìn)行取整代替該歷元的觀測(cè)值即可完成周跳的修復(fù)。(3)探索了采樣率的不同會(huì)對(duì)三頻組合周跳檢驗(yàn)量產(chǎn)生的影響,選取不同采樣率的觀測(cè)數(shù)據(jù),用三頻無(wú)幾何相位和電離層殘差法相結(jié)合構(gòu)建組合周跳檢驗(yàn)量,對(duì)比不同采樣率下的三頻組合周跳檢驗(yàn)量特性,得到最佳采樣率。(4)采用超寬巷和二階歷元差分的方法構(gòu)造組合周跳檢驗(yàn)量,提高了三頻周跳檢驗(yàn)量的靈敏度,在電離層劇烈變化的情況下探測(cè)周跳;結(jié)合奇異性探測(cè)原理,將觀測(cè)值中發(fā)生的周跳視為奇異點(diǎn),利用小波變換對(duì)信號(hào)"放大",將含有周跳這種突變信息的周跳檢驗(yàn)量進(jìn)行小波分解,確定三頻觀測(cè)數(shù)據(jù)中周跳發(fā)生的歷元。
[Abstract]:As one of the world's four largest satellite navigation systems comparable to the United States GPS, Beidou navigation is the only navigation system that has been independently researched and developed in our country and is the only one with the ability to send short message information at present. It plays an important role in the sea, land, and the air, and the use of pseudo distance positioning can not satisfy the high precision. Therefore, it is necessary to locate the carrier phase observation with high observational accuracy. However, there is a problem of cycle jumping with carrier phase positioning. If it is not processed, the positioning precision will be discounted. This paper studies the circumferential jump detection and the compound method of the Beidou carrier phase positioning for the high precision positioning of the Beidou. The detection and repair provide theoretical reference. On the basis of the single frequency hopping detection and repair method, combined with the three frequency linear combination theory, the single frequency hopping detection is extended to the Beidou three frequency hopping detection and repair, and the detection and repair of the small cycle jump is focused on, and the traditional time domain cycle hopping detection method in the carrier phase is extended to the frequency. Domain, the method of signal processing in frequency domain is used to analyze the small cycle hops effectively. The main research work is as follows: (1) the detection of the small cycle in the phase observation of single frequency carrier is carried out by SVD and Hilbert component envelope transformation. (2) the characteristics of the three frequency carrier phase combination observation are studied and the three frequency is studied. The pseudo range phase and the ionospheric residual method are combined to be applied to the tri frequency carrier phase hopping detection of the Beidou. 3 linear uncorrelated three frequency combination cycle tests can be constructed to detect the combination of arbitrary cycle hops, and this method can maintain the whole cycle characteristic of the combined ambiguity. After the cycle jump is detected, only the circumferential jump values are detected. (3) explore the influence of the different sampling rate on the three frequency combination cycle test, select the observation data of different sampling rates, and use the three frequency ungeometric phase and the ionospheric residual method to construct the group cycle jump test, and compare the three frequency under the different sampling rates. The optimum sampling rate is obtained. (4) the combination of the ultra wide lane and the two order epoch difference method constructs the combined cycle jump test, improves the sensitivity of the frequency of the three frequency cycle jump test, and detectthe cycle jump in the case of the violent ionosphere change, and combines the singularity detection to see the cycle jump occurring in the observed value as a singularity point. The wavelet transform is used to amplify the signal, and the cycle slip test with cycle slip information is decomposed by wavelet transform to determine the epoch occurrence of the cycle slip in the three frequency observation data.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN967.1

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